King RS3518-BP4P 3.5" x 18" Pure Race Series 4-Tube Bypass Shock with Piggyback Reservoir

The King RS3518-BP4P is a premium Pure Race Series bypass shock engineered for professional off-road racing applications. This high-performance shock features a 3.5-inch diameter body with 18 inches of travel and a 4-tube external bypass design that delivers position-sensitive damping and exceptional adjustability for demanding race conditions.

Key Specifications:

• 3.5-inch diameter shock body
• 18-inch stroke length
• Compressed length: 30.06 inches
• Extended length: 48.06 inches
• 4-tube external bypass configuration
• Piggyback reservoir design
• 1-inch hard chrome plated shock shaft
• Eyelet mounts with replaceable Teflon-lined stainless steel spherical bearings
• Universal fit application

Advanced Engineering Features:

• Position-sensitive bypass valving allows compression and rebound tubes to operate independently with no cross-influence
• Each bypass stage is separately tunable with 14 turns of precise adjustability
• Heat-treated stainless steel bypass valves and springs for consistent, fade-free operation
• Cold-drawn 2024 billet aluminum pistons with optimized fluid dynamics port designs
• Teflon bronze wear bands for smooth piston movement and durability
• Viton o-ring seals for high-temperature endurance
• Carbon composite wiper seals machined with diamond tooling

Premium Construction:

• CNC-drilled bypass ports, hand-deburred and polished before aircraft-quality TIG welding
• Precision bored and honed shock tubes within +/- 0.001 inch tolerances
• Shock shaft induction hardened to 60-65 Rockwell scale and micro-polished to 3 RMS mirror finish
• Threaded reservoir end caps for higher pressure capacity and simplified maintenance
• Lightweight aluminum reservoir construction for superior heat dissipation
• Pressure tested to 300 PSI before final assembly
• Hand-built in the USA with strict quality controls

This universal bypass shock is custom-configurable for race applications and includes all necessary mounting hardware with factory spherical bearings. Designed for serious competitors who demand maximum control and adjustability in extreme off-road racing conditions.